SN4 ""

No	Pattern	Freq
1	[conj] it is impossible	238
2	[that] it is impossible	108
3	that it is impossible	108
4	that it is impossible	108
5	[subord] it is impossible	78
6	[noun] it is impossible	61
7	[coord] it is impossible	52
8	[noun sg] it is impossible	42
9	[adv] it is impossible	32
10	and it is impossible	28
11	and it is impossible	28
12	[verb] it is impossible	24
13	[adv] it is impossible	23
14	but it is impossible	23
15	but it is impossible	23
16	[pron] it is impossible	20
17	[noun pl] it is impossible	17
18	[Wh det] it is impossible	15
19	which it is impossible	14
20	although it is impossible	14
21	although it is impossible	14
22	which it is impossible	14
23	since it is impossible	10
24	since it is impossible	10
25	because it is impossible	9
26	because it is impossible	9
27	[vb base] it is impossible	9
28	[Wh adv] it is impossible	8
29	[adj] it is impossible	7
30	if it is impossible	7